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Swap engine from GSX 750 to GSX-R 750


MadFred

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Posted

Hi!

My name is Fredrik and I live in Sweden, I just got my hands on a 750ef -85.. And I have an Idea of swaping in a 750gsx-r engine in it, a -91 Whould be great most punch! But it might be hard to find.. 

Is it very big differens in sizes of the engines? Will it fit , whats needed.. 

Best regards! 

Fredrik

sukka750.jpg

Posted

Yes, it will most definitely fit. Physically slightly smaller and quite a bit narower. Tabs made up on the rear bottom mount and the rest is just measuring and cutting mountingplates.

All you need is the engine, loom and a welder really :)

 

  • Like 1
  • 3 weeks later...
Posted

I need advice guys.. 
My top projekt is stalling both by money and time (the Harley Street/strip) I´m going to start dragrace to the spring, and I dont think the HD will be raceready untill late summer for the best.. So I look at my GS750EF -85 I know its not much to race with, but thats what i got for the moment (Me in school and two babys). The orginal slip tells me 12.0 sec 1/4 mile (by the producer) seems optimistic, but I would like to do under that.. Is there any possible way with a small budget? (I have big plans for this bike, just not now) For now its stock with the 32mm Mikuni and so on.. (and n2o is not legal on the tracks in sweden) ...
Thanks for helping me!
 

Posted

instead of trying to make the aircooled lump perform better, it would be cheaper to just get an oilcooled engine and fit that. You say they are hard to find in Sweden so try looking abroad, Finland for example.

  • Like 1
Posted

Understand what you mean but I literally get this engine for fee money including carbs and everything.. So more specifik whats my biggest concern , dont care so much for roadlegal. I got plasmatorch Tig welder , lathe and Mill.. 

  • 3 weeks later...
Posted

Oki here here we go!
I have come to my senses (or not) Im going to build a dragbike! some fun on the street may include.. I´ve just bought a 1150 (1316) GSX-r enginge with give or take a few 175rwhp and im going to debute in a class here in Sweden SuperGasBike Breakout 9.50.. Ofcouse the bike will be going through a transformation to manage such power and task. 
So Im going to hit it next summer ! The engine is from a well known Suzuki gury here in Sweden! 
Best Regards!

  • Like 3
Posted

Yepp!
Just have to change some plan and was persuaded that this is the one of the right way.. And Im wise enough to listened to thoose who I know have more facts and experience than me.. 

  • Like 1
Posted
9 hours ago, MadFred said:

.. And Im wise enough to listened to thoose who I know have more facts and experience than me.. 

...and still mad enough to do it.:tu

  • Like 1

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